The 4th Amendment protects citizens from unreasonable searches and seizures by law enforcement. It requires that searches be conducted with a warrant based on probable cause. A recent Supreme Court case, Riley v. California, addressed whether police could search digital data on phones seized during an arrest without a warrant. The Court ruled that a warrant is required for police to search the data of arrested individuals' phones, establishing an expectation of privacy for information on personal electronic devices. Historical cases like Entick v. Carrington influenced the drafting of the 4th Amendment by establishing that warrants must name the items to be seized and show probable cause.